SkinManager.cpp

MGR: Add 6 new tags to allow the backgrounds of the Simple View and Simple Preferences dialog to be anchored at any of 9 points, for flexibility in placement of the logo or other graphic element that should always be visible.
Vertical anchor is one of: <anchor_vertical_top>, <anchor_vertical_center> or <anchor_vertical_bottom>.
Horizontal anchor is one of: <anchor_horizontal_left>, <anchor_horizontal_center>, <anchor_horizontal_right>.
If none of the tags are present, these default values are used:
The defaults for the main Simple View background are <anchor_vertical_top> and <anchor_horizontal_left>.
The defaults for the Simple View Preferences dialog background are <anchor_vertical_center> and <anchor_horizontal_center>.